Timepiece



Jan. 8 1924. 1,480,511

H. COLOMB TIMEPIECE Original Filed May 15. 1921 Patented Jan. 8, 1924.

PATENT OFFICE.

HENRI COLOMB, OF TAVANNES, SWITZERLAND.

TIMEPIECE.

Original application filed May 13, 1921, Serial No. 469,311. Divided andthis application filed September To (471 10720177. it may concern:

Be it known that I, HnNni CoLoMB, a citizen of the Confederation ofSwitzerland, residing at Tavannes, Switzerland, have in vented 7 certainnew and useful Improvements in Timepieces, of which the following is aspecification.

This application is a division of my application No. 469,311 filed May13th. 1921. patented December 12, 1922, No. 1,438,427.

The present invention relates to a time piece provided with a stem oftwo pieces, both parts of said stem being coupled and uncoupled by arelative rotative movement, one of said parts being, for this purposelocked.

In the remontoir-mechanism and hand setting known as positive, the stemon which the crown is fitted, is of one piece and is directly coupled toa lever known as a draw-piece or bolt which is set in action by means ofthe crown.

The draw-piece is kept in contact with the stem by means of acollet-screw adjusted between the bridge and the plate.

In order to fasten or to take off the stem when the movement is cased ortaken out, it is necessary to act on the above-mentioned screw and thismay be done from the movement side.

It is therefore comprehensible that movements provided with suchremontoir-mechanisms with draw-piece cannot be used with cap-cases.

Some constructions have already been proposed in order to obviate, saiddisadvantage, but in all constructions, the coupling and unlocking ofthe stem and of the drawpiece is done by means of a special mechanismacting upon said draw-piece, either vertically or parallel with regardto the movement.

In order to be used with a cap-case, the movement of a time pieceaccording to the present invention wants no modifications, even if it isprovided with other constructions already proposed and above mentioned.

This result is obtained by means of a stem.- of two pieces which arerigidly coupled one with the other, preferably by screwing or by meansof a bayonet-joint.

Both sorts of coupling could be done only when the winding up isfinished, but the spring and eventually the stop-work suffer Serial No.587,782.

thereby; the uncoupling could however not take place. The time pieceaccording to the invention has therefore been provided with means forlocking the part of the stem connected with the movement, this in orderto obtain the coupling and especially the uncoupling of the outer partof the stem going through the pendant with the part connected with themovement.

In certain cases, the outer part of the stem may be omitted; i. e. inthe braceletwatches the crown will be screwed on the inner part of thestem.

The movement of a watch according to the present invention may be casedin capcases, even if it is provided with a pushhand-setting or if thestem is coupled with the movement by means of a bridle, the

screw of which is accessible only from the movement side.

One time-piece provided with a stem according to the invention isrepresented in the annexed drawings, as explicative, but not restrictiveexample.

Fig. l is a fragmentary plan View of a movement with remontoir-mechanismand draw-piece hand setting, with my mecha nism applied. thereto.

Fig. 2 is a side view of the inner section of the improved stem.

Fig. 3 is an edge view of a portion of the mechanism shown in Fig. 1.

Fig. 4 is a diametrical sectional view showing the movement having myimprovements, arranged in a portion of a case.

Parts a and b of the stem are coupled by screwing. The locking of theinner part connected with the movement is directly effected by means ofthe extremity of a slidebar 9 which catches in a notch h of the. stem.Part I) of the latter is more especially represented in Fig. 3. Saidslide bar is forced into said notch in order to lock the part 7) againstrotation.

The slide bar is provided with a fingerpiece g bent perpendicularly tothe plane of the plate and a certain length of which projects from thelatter; said slide-bar is curved so as to rub against the periphery ofthe plate, by means of a screw It is to be considered here that the casein which the movement is placed, has neither a groove or notch toaccommodate the slidebar 9, this being an advantage in manufacturing.

The assembling is eliected by introducing, at the same time, the catchplaced near the stem under the rim of the case and the upper extremityof part b of the stem in the pendant of the opening of the case providedfor the same and by pressing on the movement on the side opposite tosaid parts till the shutting has passed under the case-band edg eagainst which the plate leans.

The shutting is provided With a bolt 2' pt in place by a spring 70embedded in a he groove 01 the plate and engaging in a hollow of thebolt.

instead of being coupled by screwing, the parts of the stem could alsobe coupled one to the other by means of a bayonet-joint.

I claim:

A time piece Which is provided with a stem of two pieces, both parts ofsaid stem being coupled and uncoupled by a rotati've relative movement,one of said parts being locked in order to uncouple both parts, thelocking of the lower part being effected by means of organs directlyacting; on said part, the latter being provided With a notch in Which alocking device may be introduced, this locking device consisting in apushpiece fitted to the plate.

In testimony whereof, I afix my signature.

HENRI COLOMB.

